Kev Tswj Xyuas Kev Ruaj Ntseg Rau Portable Mini Gas Filling Stations

1. Siab Vessel Vuam & Tsis yog -Kev Ntsuas Kev Ntsuas (NDT)

Welding defects nyob rau hauv lub tank cia-xws li tsis muaj fusion, tsis tiav kev nkag mus, porosity, thiab micro- tawg- yog tsis yooj yim sua kom pom qhov muag pom. Nyob rau hauv lub siab cyclic, cov tsis xws luag propagate nyob rau lub sij hawm, nws thiaj li ua rau muaj kev puas tsuaj ntawm cov txheej txheem tsis ua hauj lwm los yog sai tso pa roj.

Common Supplier Shortcuts:

Unqualified Welders:Kev siv cov khoom siv hluav taws xob tas sij hawm lossis tsis raug Welder Performance Qualifications (WPQ), qhov twg cov khw muag khoom tiag tiag - cov welders hauv pem teb tsis phim cov neeg ua haujlwm uas tau teev nyob rau hauv cov ntaub ntawv zoo.

Qiv Welding Procedure Qualifications (PQR):Xa PQRs los ntawm cov haujlwm tsis sib xws, ua rau cov khoom siv welds tiag tiag uas sib txawv los ntawm kev pom zoo ntawm cov khoom siv hluav taws xob, qhov kub thiab txias, thiab cov khoom siv hlau.

Shortchanged NDT Scope:Txo qhov yuav tsum tau 100% Radiographic Testing (RT) mus rau qhov chaw tsis raug cai- kuaj xyuas (piv txwv li, 10%–20%), thaum hla qhov yuav tsum tau Magnetic Particle Testing (MT) lossis Liquid Penetrant Testing (PT) ntawm cov hauv paus hla thiab nozzle fillets.

Falsified Test Documentation:Tshaj tawm tag nrho cov ntawv pov thawj Class I NDT cov ntaub ntawv ua tiav nrog cov ntawv tshuaj ntsuam xyuas yam tsis tau ua qhov kev ntsuam xyuas lub cev tiag tiag.

Uncertified Weld Repairs:Ua kev kho qhov chaw hauv cheeb tsam ntawm cov ntu ua tsis tiav yam tsis tau ua cov txheej txheem NDT thib ob uas yuav tsum tau ua.

Piv txwv teb:Ib tus neeg yuav khoom nyob rau sab hnub tuaj Asia tau ntsib qhov hauv qab - seam siab lub nkoj xau tom qab 6 lub hlis ua haujlwm. Kev tshuaj xyuas rov qab tau qhia tias tus neeg muag khoom tau ua tiav tsuas yog 15% kev tshuaj ntsuam RT random -ua tiav MT- txawm tias xa cov ntaub ntawv pov thawj raws li"100% Tested/Class I Compliant."

Buyer Verification & Mitigation Protocol:

Contractual NDT Clause:Qhia meej meej NDT kev pab them nqi thiab kev lees txais hauv kev xaj khoom (xws li,"100% Volumetric NDT ua tiav los ntawm cov neeg ua haujlwm tau ntawv pov thawj Qib II / III raws li ASME Tshooj VIII / EN 13445 tus qauv, nrog rau tag nrho cov ntaub ntawv traceability").

Ntawm -Site Witnessing (PSI):Teem kom lub chaw ua haujlwm thib peb uas tsim nyog -Party Inspection (TPI) ua tim khawv txog kev tua NDT nyob hauv khw hauv pem teb es tsis yog cia siab rau cov ntawv dossiers nkaus xwb.

Digital Traceability Audit:Yuav tsum tau thawj cov duab hluav taws xob digital (DR) lossis cov yeeb yaj kiab scans thiab hla- txheeb xyuas NDT qhia cov lej cim tawm tsam daim ntawv pov thawj lub cev cov ntawv sau npe.

LPG Specification:Ua yuam kev100% RT / UT kev pab them nqirau tag nrho cov longitudinal thiab circumferential siab hlab seams ntawm LPG siab hlab ntsha.

2. Kev tawg-Cov pov thawj (Ex) Cov Hluav Taws Xob Hluav Taws Xob

Kev tawg- pov thawj kev ua raws li hluav taws xob feem ntau yog ua raws li daim ntawv lossis "daim ntawv-tsuas yog" ua raws. Cov kab ke yuav tuav tau tag nrho cov kev sib sau ua ke Ex daim ntawv pov thawj thaum lub tsev tsis yog - ntsuas cov khoom lag luam hauv cov khoom siv tswj hwm.

Common Supplier Shortcuts:

Tsis yog -External Cheebtsam:Txhim kho cov tswj vaj huam sib luag nrog kev lag luam - qib breakers, contactors, los yog lub davhlau ya nyob twg blocks uas tsis muaj ntawv pov thawj Ex.

Tsis zoo Spare Entry Sealing:Tshem tawm cov khoom siv cable uas tsis tau siv tsis tau kaw lossis ntsaws nrog cov uas tsis yog- ua raws li cov khoom siv tsis siv neeg yuav tsum tau siv cov hlau nres (tsawg kawg 2 hli steel phaj thickness sib npaug).

Tsis tiav Ex Nameplates:Kev tshem tawm cov ntaub ntawv tseem ceeb ntawm cov ntawv teev npe, xws li Ex cim, kev tiv thaiv lub tswv yim (xws li, Ex d, Ex e, Ex i), pab pawg roj (xws li, IIB, IIC), chav kawm kub (T-code), lossis daim ntawv pov thawj naj npawb.

Faulty Cable Glands & Armor Integration:Kev sib khi tsis txaus ntawm cov ntsiab lus nkag cable, suav nrog kev puas tsuaj lossis qhov khoob hauv armored cable steel braiding.

Substandard Grounding:Kev sib txuas hauv av xoob lossis tsis tau lees paub ua rau lub voj voog hauv av tiv thaiv ntau tshaj qhov yuav tsum tau ua $\\le 4\\,\\Omega$ pib.

Counterfeit Ex Certificate:Xa cov ntawv pov thawj kev dag lossis tsis sib xws Ex daim ntawv pov thawj uas tsis tuaj yeem lees paub los ntawm kev tshaj tawm cov ntaub ntawv pov thawj (xws li IECEx, ATEX, UL).

Buyer Verification & Mitigation Protocol:

Cheebtsam -Level Certification Audit:Yuav tsum tau luam thawj cov ntawv luam ntawm ob qho tib si - qib thiab ib tus neeg Ex daim ntawv pov thawj rau txhua qhov hluav taws xob sub- cov khoom, xyuas cov lej pov thawj ncaj qha ntawm kev tshaj tawm cov ntaub ntawv pov thawj.

Kev Tshuaj Xyuas Lub Cev Lub Cev:Thaum Lub Sijhawm Ua Ntej -Kev Tshawb Fawb Kev Xa Khoom (PSI), qhib tag nrho cov tswj vaj huam sib luag thiab cov thawv sib txuas kom paub meej tias cov ntawv teev npe ntawm cov khoom siv sab hauv yog cov ntawv pov thawj kev xa khoom.

Cable Entry Verification:Tshawb xyuas tag nrho cov khoom siv tsis tau siv kom paub meej tias kev ua raws li steel nres ntsaws cov cai.

Grounding Resistance Ntsuas:Ua qhov kev ntsuam xyuas ncaj qha hauv av txhawm rau txheeb xyuas tag nrho cov av tiv thaiv kev ntsuas $\\le 4\\,\\Omega$.

CNG Siab Sensor Mandate:Xyuas kom txhua lub qhov hluav taws xob siab transmitters ntsia ntawm CNG dispensers muaj kev ywj pheej, siv tau tawg - ntawv pov thawj.